Padlock



(Nd Model.)

G. BRAMBEL.

PADLOGK.

No. 401,407. Patented Apr. 16, 1889...

ATTORNEYS.

N. FETKRS, PI'oID-Lilhngraphar. Wllhiuglon. D. C.

UNITED STATES GRANT BRAMBEL, OF LAKE PARK, MINNESOTA.

PADLOCK.

SPECIFICATION formingpart of Letters Patent No. 401,407, dated April 16,1889.

Application filed March 26, 1888. Serial No. 268,478. (No model.)

To all whom it may concern:

. Be it known that I, GRANT BRAMBEL, of

Lake Park, in the county of Becker and State of Minnesota, have inventeda new and Improved Padlock, of which the following is a full, clear, andexact description.

The object of this invention is to provide a cheap, durable, andefficient padlock; and to this end the invention consists in thepeculiar construction and arrangement of parts, as hereinafter fullydescribed, and specifically pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar figures of reference indicatecorresponding parts in all the views.

Figure 1 is a longitudinal sectional view of a lock constructed inaccordance with the terms of my invention, the view being taken on lineww of Fig. 2. Fig. 2 is an inverted sectional plan view taken on line yy of Fig. 1. 3 is a side view of the key, and Fig. 4 is a view of amodified form of tumbler.

In the drawings above referred to, 10 is a lock-case, to which there ispivotally conn ected abow or shackle, 11, formed with a recess, 12, andan inclined bearing-face, 13, upon the projection 14:, that is below therecess 12. This shackle is also formed with a shoulder, 15, which bearsagainst the upper plate of the case 10, limiting the downward movementof the shackle, and thereby insuring a space, 16, between the lower wallof the case and the shackle end, which space is utilized as a key-hole,as will be hereinafter explained.

lVithin the case 10, I mount any desired number of tumblers, 20, whichsaid tumblers are formed with slots 17, the upper forward faces, 2, ofthe tumbler-sections above the slot being rearwardly inclined or curved.The sections 3, below the slots 13, are of different lengths, as will beseen from an inspection of Fig. 2. In connection with each tumbler thereis arranged a spring, 21, and to the rear of the tumblers there is astop,

In placing the tumblers within the case the bow or shackle is thrownbackward and the tumblers are inserted and forced inward against thetension of their springs, after which a retaining-pin, 22, is passedthrough properly-located apertures formed in the case 10 and through theslots 17 of the tumblers. The pin having been so placed and the pressurebrought to bear upon the tumblers released, their springs 21 will act toforce them forward to the position in which the tumbler is shown in Fig.1, and if at this time the bow or shackle be moved downward its inclinedface 18 will bear against the rearwardly inclined or curved faces of thetumbler-sections 2, and the tumblers will be forced backward until thetongue or projection 14. has passed below the tumbler-sections 2,immediately after which the springs 21 will act to force the tumblersforward, so that their sections 2 will pass within the bow or shacklerecess 12.

To unlock the look, I provide a key such as the one shown in Fig. 3, theend of said key being stepped, so as to coact with the tumlock, as willbe readily understood.

Having thus fully described my invent-ion, I claim as new and desire tosecure by Letters Patent 1. The combination of a lock-case having anopen end and its upper wall cut away at said open end, a pivoted shacklehaving its recessed free end entering the lock-case through the cutawayportion, with its outer surface flush with end of the case and extendinginto the said case a distance less than the depth thereof, to leave aspace between the lower wall of the case and the shackle for theinsertion of a key, and a series of sliding and spring-actuated tumblersin said case and engaging the recess of the shackle, substantially asdescribed.

2. The combination of the lock-case 10,hav ing an open end and its upperwall cut away at said end, the shackle 11, pivoted to the case andprovided with the recess 12 and shoulder 15, the tumblers 20, providedwith the slots 17, the transverse pins 23, and the springs 21,substantially as herein shown and described.

lrRANT BRAMBEL.

IVitnesses:

Tnos. L. CORRIS, O. I. BERG.

blers employed in the construction of the

